Vine's popularity is growing, too. Topsy recorded 2,966,979 Vine shares on 8 June compared to 2,471,044 shares for Instagram.

This could have something to do with the fact that Vine is supported by Twitter Cards, which means users can view the six-second video clips from another user's tweet. Instagram recently pulled support for Twitter Cards, however, which means users have to click through links to view images on the service.

Still, not only is Vine more popular on Twitter, it also appears to be outshining Instagram in the Google Play store. At the time of writing, Vine is ranked as the top social app in the Android app store and the fourth most popular free app on Google Play. Instagram, on the other hand, ranks fifth.

It's done pretty well in the iTunes App Store too, with Twitter boasting last week that Vine has seen 13 million downloads on iOS. This apparently spurred on the firm's decision to release an app for Android, which includes unique functionality including a Zoom feature found on the iOS app.

However, Vine app users on Android don't have support yet for front-facing cameras, mentions, hashtags or Facebook sharing. µ